Paris' linguistic guide to the international language of, yes, love.

The first green space constructed on an elevated viaduct.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

A hugely vast Irish landscape of barren rock that stretches for miles.

This modest plaza in Moneygall, Ireland has cashed in on its distant connection to the U.S. president.

The final resting place to 300 Victorian-era pets hides inside the city park.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

This chimerical bridge/tunnel appears to dead end right into the sea.

The charming storybook building now houses a small police museum.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

A Gothic-inspired fish market is Gothenburg's best place to find loaves and fishes.

The world's biggest floating museum in Gothenburg, Sweden.

The library's graceful rotunda is like a bibliophile's temple.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Although rarely used, there is still a hidden room for the royal family at the Stockholm central station.

Take a walk in a recreation of ancient Rome.

An industrial relic is now one of Europe's most staggering art spaces.

Thousands of flowers create enchanting pink tunnels over the city streets.